import volume; amount of imports
Used in economic, trade, and statistical contexts to refer to the quantity or value of imported goods.
This year's import volume increased compared to last year.
The volume of crude oil imports is decreasing.
輸入額 refers specifically to the monetary value of imports, while 輸入量 can refer to quantity or volume.
Compound of 輸入 (import) + 量 (quantity, volume).